Yes. It gives you options. I've stayed some places, where the 30Amp socket looked a bit iffy, so I used the 50Amp socket instead (with the adapter). I've also seen where the 30Amp breaker was weak (kept tripping when I knew I was running less than 30Amps and I had no wiring or ground issues) so had to use the 50, again.
It is always better to have options, than to be stuck.
Ben and Doreen
Home Away From Home - 2017 PT Crusader 315RST
TV - 2008 F250 Lariat 4X4 6.4 Diesel
42 nights camping in 2015
61 nights in 2016 (still not enough!)