If anything coinjoins are worse. They don't hide amounts. Since amounts are visible it leaves you more open additional heuristics that can reduce/undo obfuscation.

Some coinjoins may have a larger anonymity set for a single coinjoin, but I doubt that is true over time and over multiple transactions since they are optional. Very few transactions are coinjoins and the few that do are likely not for every spend. Additionally your anon set shrinks over time as those prior coinjoin peers make mistakes or send those funds to be KYC'd by exchanges and there is nothing you can really do about that.

Strong default privacy is important.

You are conflating anonymity with privacy.

Onchain bitcoin is NEVER private, as amounts + sender + receiver are always recorded onchain.

It can be pseudonymous (you don't know who the addresses belong to) at best, but never anonymous, as you can always see the addresses.

And over time, because of this, the pseudonimity tends to turn into certainty.

What are you going to say by the end of the year when FCMPs++ are activated, Monero has zcash-style anonymity of 1 in 100 million AND FCMPs++ allows tx chaining which will enable Lightning-like L2s? will Monero be simply superior by then, or will you just join the other maxis and say "monero bad because price go down"?

I am honestly curious what will you think of it and how will bitcoin remain superior for you