Looking at the comment replies to any Jeremy Corbyn tweet (even ones on non-spicy topics) is always a good reminder of the futility of reformism. The Bourgeois state can and will utilize the most effective propaganda apparatus in history to warp people’s minds in real-time to their own aims. Like here where this dipshit thinks a flimsy accusation thrown at China over Uyghurs is somehow worse than the very-real pogrom with a mountain of recorded evidence coming in as we speak.
Despite its many, many, many limits, reformism exists in many places a genuine revolutionary approach does not (US and UK). You either get a little something or you get nothing. Which approach are people more likely to support?
Leftists should support reforms where they happen (see Sawant's caste discrimination law) but make the case that reforms are not close to enough. You get people to listen to you by improving their material conditions (reforms) and then talk to them about how more comprehensive change is needed (revolution). Ideally, some reforms give the working class a little more breathing room, or roll back a little bit of the state's repressive capacity, and then your revolutionary change is easier.