Bumpers are dangerous. Babies of any age can roll and get head stuck and suffocate. I would NEVER use one. Not recommended in UK until after 12 months of age. I would not risk it for the sake of a pretty looking cot.
I didn't see anyone saying they would use one for a pretty looking cot? I don't think theres anyone who would risk their babies life for a pretty cot! Some people are comfy with them whist others aren't but they do need to be secure and tight so babies head can not get stuck in it - thats just sense.
Some info suggests that you stop using bumpers when baby can sit up and pull themselves up using that as a helping hand ... theres no evidence that bumpers increase or decrease cot death.
A further 32% wrongly identified cot bumpers as a risk, but research has shown that they have neither good nor bad effects in terms of cot death risk
https://www.fsid.org.uk/mothercare-poll-press.html