I don't think stating objective truth can be reactionary- and there are definitely some hard-working business owners (though I'd argue there are at least as many who aren't, whether they were formerly or not).

But those focusing on the hard work of (some) business owners, without recognizing the broader context, are disingenuous at best. Naturally, those who can see a correlation between their labor and returns- those who are not alienated from their labor, and who in fact receive an inordinate return through the alienation of their employees' labor- will have more reason to be motivated, if they were so inclined.

I think when we note that business owners can (and sometimes, do) work hard- we must note that this is not some individual virtue, and it does not entitle them to exploit the work of others, not even those deemed "less virtuous/hardworking" within the capitalist system.