is the only reason to use something other than bitcoin core to create a wallet to set up multi-sig?

im looking at a seedsigner and they recommend sparrow or specter desktop wallet. is it just "easier" to create a watch-only wallet with those?

im trying to understand better why someone would want to use something other than btc core for cold storage wallet set up and have to work with two different programs instead of one?

i want to make the best decision for my use but its hard to understand all the use case to determine that. appreciate you alls responses.