Deebo Samuel is already chewing up 10% of their cap space. Aiyuk on his current contract is chewing up 5%. They may just not want to overspend on WRs when they have other priorities as a really good defensive, really strong offensive running team and they don't feel like dealing with this headache. So I wouldn't read that much into it. Also, Pats aren't the 49ers, they need to reason about how he would fit into their scheme, not how the 49ers feel about him in their scheme.
Obviously I'm leaving open how he would fit in here, but 49ers have a lot of reasons they may not want to back up the Armored Truck to Aiyuk that aren't relevant to the Pats.
Rumor is considering Samuel is not irrelevant here...
The 49ers have an urgent decision to make on Deebo Samuel and Brandon Aiyuk amid stalled contract extension talks that could lead to a trade.
clutchpoints.com
Obviously take that with a grain of salt.