There is no need to attack here. OP did run into a corner case in remove [find], so yes a bit of discussion is normal. But quibbling is bit much.
As noted, numbers= is implied. It's need sometimes in REST API. Nothing, per se, wrong in using it. Just more verbose, and less clear to readers IMO.
But the topics="dhcp;info" part does solve the exactness problem in regex. Assuming RouterOS maintains the order, which AFAIK it should but who knows
It's a shame that anyone can read what's written on the forum,
and saying I told a third lie is nonsense, devoid of any logical reason.
Staying in cat-like style...
Come on, let's stop now, even for the next time.
If you want help, and you feel worthy of accepting it, ask (in what I know, obviously).
No one @Amm0 is involved on the image 
If it’s an array it’d be counterintuitive if it didn’t; but thanks for pointing out the possibility. All in all I found responses very instructive to gain a wider understanding, not just in solving the imminent issue. So thanks y’all again.
One more for educational purposes. Part of the underlying issue is there no "is member of" operator for arrays.
There is :find (which is different from / find). So this also work, for even crazier example:
/system/logging remove [find [:find $topics "dhcp"]>-1 [:find $topics "info"]>-1]
Background is find on a command is a iterator of the "list" of the current command, while :find will get an index from a string or array type.
I've argued that in should work with array too, so there is boolean to check if a item is inside an array variable, like "dhcp" in topics, instead in just operates on ip address type like (192.168.88.4 in 192.168.88.0/24)
FWIW, I filed a feature request to add comment= to /system/logging (SUP-208069), since MirkoTik has been fixing up scripting recently (:tobool "true" 
). IMO all config items should support comment= to allow easy matching in a find. And most do support comment= these day... somehow this one escaped anyones notice My defense is like @rextended, I have custom defconf's that only add, and then use winbox for any one-off logging things