efbgen - yes it surely would be most uncomfortable!
I with Ginger on the 3/4 sleeves - I love how they look, but find them unpractical for exactly the same reasons. I should make a rule to never buy them, but there are so many out there that I've bought 3 in the last year. And only this morning I put one on, realised it wasn't going to be warm enough, and had to change to a shorted sleeve top so I could wear another layer. I try to wear my 3 tops just by themselves lots in the transition seasons, but even then (e.g., yesterday) I had moments of feeling a bit cold.
On the shorts in church thing - 2 of my daughter wear shorts every week in summer. And at the informal student evening service we go to I counted 3/4 of the band members wearing shorts on Sunday night. It is appropriate for our setting.