Nowadays, with everyone waiting to jump on your back, maybe some ATCOS feel it is more judicious (& self preserving) to initiate a go around. I would not necessarily have done the same, but I grew up in the era of "operational common sense" & not in that of "blind pedantry". Not that I am in any way accusing this ATCO of being pedantic ! (just a commentary in one aspect of modern day aviation).
Nevertheless, I would not criticise the ATCO in this case without knowing exactly what all of the factors were; &, even then, I would support him in trying to deliver a safe service & protect his licence .
There is often more than meets the eye to situatons.