If by "gaming" you mean "be able to play a selection of games you might or might not be interested in, in varying states of support and performance", then yes - absolutely true.
None of the games I've played recently even are on Steam, so no, your answer is misleading at best.
And no, I've not tried it recently on my main machine but I've tried it often enough that my summary is still: Feel free to try it, but many (or most) of us still have to stick with Windows even if we don't like it.
Unless you are playing the competitive games that won't turn on anti-cheat for Linux, this seems statistically incorrect. Valve prioritizes fixes for the most popular games, so the games most people want to play will work (if they are not actively prevented by the publisher as with anti-cheat).
None of the games I've played recently even are on Steam, so no, your answer is misleading at best.
And no, I've not tried it recently on my main machine but I've tried it often enough that my summary is still: Feel free to try it, but many (or most) of us still have to stick with Windows even if we don't like it.