No, it's definitely not. The next frontier of war is space. This frontier was officially opened in November last year, when Israel used the Arrow-3 system to intercept a Ghadr-110 ballistic missile launched by Yemen at Eliat. The interception took place in the Exosphere, over 600km above sea level. The first instance of warfare in space. There have been more exoatmospheric interceptions since, most notably during Iran's ballistic missile retaliatory attacks. This allowed us to get videos of an exoatmospheric interception. This one is from October, and this one was from April. You can see the large blue to purple plume it produces. In theory, these Arrow-3 interceptors could also be used to destroy enemy satellites.

This is not even mentioning Boeing's X-37b unmanned spacecraft operated by the United States Space Force, which can stay in orbit for years at a time, and two days ago performed an aerobraking manoeuvre, dipping slightly into the Earth's atmosphere to change it's orbit. There is much speculation around the true role and mission of this aircraft, with theories ranging from anti satellite capabilities, to being able to repair and modify allied satellites, to it being nuclear armed and part of a Fractional Orbit Bombardment System (FOBS).

China have also been testing a FOBS/Hypersonic Glide Vehicle combination system, and much has been talked about Russia's anti satellite weaponry from the Soviet era to now, from satellites that can kinetically attack other satellites or de-orbit them, to space deployed nuclear weapons that could disable a mass amount of satellites in the proximity of the explosion. Russia's new ICBM could also double in function as a FOBS, with the ability to stay in low earth orbit, before de-orbiting and returning to a ballistic trajectory. Such technology has been worked on by Russia since the Soviet era, with the GR-1 missile concept from the 1960s being the first known instance of a nation working on FOBS. They had 18 working FOBS capable missiles that were decommissioned due to an agreement with the USA.

They already exist:

The ASAT test in November is the latest in a series of such actions by Russia. The missile used in the test, Nudol, has been tested several times in the past without a hit-to-kill mission. At the 2021 Reagan National Defense Forum, U.S. Rep. Jim Cooper (D-Tenn.) noted that Russia had attempted to test its ground-launched ASAT missile “several times in recent years and failed, so it was predictable that they would keep trying until they scored a hit.”12 The latest hit-to-kill demonstration indicates that Russia may have perfected its ASAT missile.

In 2014, the Russian Olymp-K satellite demonstrated co-orbital ASAT capabilities in the geostationary orbit where several critical military command-and-control satellites operate.13 Additionally, Russia has fielded ground-based lasers and a range of satellite-jamming systems to deny and degrade the capacity of weapons that rely on satellited-enabled information. These weapons are detailed in Russian military literature as a vital mechanism to eliminate Russian vulnerabilities to Western precision weapons.

Russia has also tested co-orbital ASAT systems that target satellites beyond low-earth orbit. In October 2017, three Russian satellites—Kosmos-2519, Kosmos-2521, and Kosmos-2523—conducted high-velocity orbital maneuvers. In January 2020, two Russian satellites, Kosmos-2542 and Kosmos-2543, performed coordinated, close-approach orbital maneuvers in the vicinity of a U.S. military reconnaissance satellite, the KH-11. Six months later, in July 2020, the Kosmos-2543 satellite fired a high-velocity projectile into outer space. Such a projectile could act as a potent ASAT weapon. U.S. Space Force commander Gen. John Raymond has described the orbital experiments performed by these satellites as “Russian nesting doll” satellites and claimed they “exhibited characteristics of a weapon system.”