On the other hand, “i had a problem, therefore there is a problem” danced with fallacious reasoning, too.
Is it really? It certainly isn't the same level of hasty generalization as the previous. All one needs to do is show that
some people have problems to show that, yes, something should probably be done to address them. One does not need to show that
absolutely everyone has problems in order to say that there is a problem going on that could be fixed, or at least mitigated.
One must in fact actually show that nobody has a problem in order to say that there is no problem at all.
And I think, given the many, many, MANY threads on the topic...and statements from actual designers...and youtube videos...and personal stories...etc., etc.,
ad nauseam, is a pretty good reason to say that, yes, there are some problems here that could be addressed.
Both "I don't have a problem, therefore there isn't a problem" and "I have a problem, therefore there is a problem" are bad arguments.
See above. The former is "because I don't have a problem, nobody could possibly have a problem." The latter is "because I have a problem, there is a problem to be solved." The two claims are
not comparable. One is a universal negation "derived" from a single personal experience. The other is not a universal claim in any part. Proving a mere existence claim only requires one example. It is, of course, useful to demonstrate that the problem is not unique to you, but useful and necessary are two distinct things.
The only good arguments to me are "what are the most common playstyles and do they have problems.".
The tricky part many do want to admit is that Some valid styles of D&D 5e can be played as is played at high levels and Other valid styles are not playable and can't be played.
Usually because unfortunately many D&D fans are selfish and only truly care about their preferred playstyle.
I make it a firm policy to fight for playstyles I don't personally enjoy. It's why I have always--since before 5e launched--advocated for robust, well-featured "zero level" rules present in the core books, and which are treated fairly and respectfully, not cordoned off or treated like something dangerous or problematic. I have no use for such rules; they represent a playstyle I have zero or even negative interest in playing. But I am firmly committed to getting them included, because I know a
lot of people would love to have them.
I also advocate for playstyles I
do enjoy. But I refuse to be selfish about it.