Is there a reason to stay away from call spreads? A wider bid-ask spread? More dangerous than put spreads?
In my case I stick to Puts only b/c it's easier to handle in a CashAcct.
In a CashAcct you can do only covered trading, ie. covered call, and cash-secured put.
Covered Call means LongStock + ShortCall, so effectively Call spreads are not possible in CashAcct, so what's left is Put spreads
No, I don't need a MarginAcct. I'm deliberately & willingly limiting myself to CashAcct. Some might think "what a masochist"

It's like saying "If I can make it there, I'll make it anywhere"...

Ie. I do it my way...
And: using Puts only one can sell even for either direction: bullish as well bearish,
by chosing an appropriate strike for the LongPut that is either < strike of ShortPut (bullish),
or > strike of ShortPut (bearish).
Update:
also a reason is: the risk with ShortCall is unlimited, not so with ShortPut, cf. the table in this posting:
https://www.elitetrader.com/et/threads/the-put-sellers-journal.368445/page-9#post-5684359