I think that maybe the alphametic tag should imply that working is required in the answer.
For example https://puzzling.stackexchange.com/a/31354/16717 was accepted as the correct answer after others proved that there were not multiple solutions*.
Maybe the tag should even imply no-computers, although there may be very large space problems which could be interesting to solve by coding (I mean ones that are too big to simply traverse permutations, like the code I provided for further evidence in my answer).
* the OP thought there were multiple solutions since the puzzle book it originated from stated such. I cannot read Russian so cannot confirm from this image if there is more to it than plain alphametics