It is very much a matter of judgement.
The only requirement is that decisions of the council must be recorded in the minutes, along with matters such as apologies for absence, statements of interest and so on. There's a lot to be said for recording matters that crop up without being decided on, so that there is something to prompt a follow up. This includes matters raised by members of the public.
On the other hand, it's may not be desirable to record opinions or personal statements. Often, a generous policy of acceding to requests to make a record is best. The problems come if the minutes become a forum for pursuing a dispute, with conflicting statements being recorded. It's best to avoid this.
In the end, it is up to the council, when approving minutes to decide whether to strike out something that is not needed as a record of a meeting and is not conducive to the running of the council.