When you link your bank account with exchanges, banks know the money comes from our crypto transactions.
And while most do care (even too much!), afaik some few others don't. If I'm not wrong (I no longer know for sure, I think N26 was one of them), using those would be an useful direction, if available.
Another good practice can be to not use the same bank for the day job income and for crypto trades.
What I mean by getting payment in different payment methods is that if there are any Bitcoin ATMs, utilize them. Almost every country has some kind of payment method like Cashapp, Perfect Money or others.
Most of those come with extra costs some simply don't want to pay. Plus, lately Bitcoin ATMs ask more and more for ID. So your advise can easily become a trap.
My point overall was that in an ideal world we would be using Bitcoin without any interaction with fiat. In this imperfect world.. everybody has to find his way, just it's best if one makes sure he's careful and knows the pluses and minuses for the choices he makes.