Let’s not use polite euphemisms here.
GP didn’t mean wars in general (though they’re very often bad!), they were clearly referring to the Trump administration starting a massively costly war with unclear objectives and no realistic way to achieve the stated ones, tanking the global economy and triggering a likely famine a year down the line, right after cutting funding for many life-saving programs at USAID with the stated purpose of cutting spending.
In that context, “they might sometimes be necessary” and “any successes are not also your successes” are not going to ever be relevant.
The interactions between the American revolution and the French revolution are complex. One of the most famous French revolutionaries, La Fayette, served as a general for the US revolutionaries for years on behalf of the French crown.
The French monarchy supported the American revolution for both ideological (enlightenment philosophy was somewhat widespread among the elites) and realpolitik (fuck England) reasons.
On the other hand, yeah, once the American won and established a democracy, “why couldn’t we do the same here?” was a very obvious question in everyone’s mind.