It's probably not "good". But.. and I'm gonna copy paste a comment I saw on fb by Eli Baraty as a response to another about the chop costing him the point etc.
"Yes..
but I think we often forget why we play sport! We all start playing a particular sport because we enjoy or love it, Stephane clearly loves playing and losing a point here and there due to joy is more than acceptable in my eyes. We learn when we experiment and for me freedom and expression in sport is too often restricted by external factors. The best ever Roger Federer, Michael Jordan, Messi etc. Express themselves regardless of the situation hence they shine as sportsman..."
For me, this sport is about enjoyment even though I am competitive.
I don't usually do these types of silly things during games, but my team mate loves to start lobbing, chopping or hitting around the nets and goes for these at every opportunity even if it costs him the point or potentially even the game. I don't usually do that because I want to play properly and not endorse bad habits. So, it depends what you mean by "good". It's good fun for me and others to watch and it's probably good fun for him to do.
Is it good for him to win? Probably not.. but winning isn't everything. Is it good for development? Probably not as you'll likely find yourself doing these things more and more often. But he's doing his thing and it's great to watch.
I don't quite understand what you mean by losing the point without admitting it.. how is he supposed to admit it and why does this matter? I've seen you comment about it before, I'm just curious as to why it seems to be such an issue to you?