Most people won't care. We know that it's not official and is nor representative of us.
Most people won't know. Not sure what you mean by "us" since Bitcoin is open source and decentralized anyone can use it.
The site decides which wallets and services get listed. the site is directed at new users who don't know about Bitcoin.
People rarely do very much research when they are just getting started anyway. Without any kind of "official" (regardless if it can actually be "official") then people will likely end up using some kind of scam wallet (like inputs but not as widely known of a scam).
How about all the users who trusted the Bitcoin Foundation logos on all those sites where their funds were lost? If the Foundation logo appeared on a web site it was highly likely the customers would lose their funds. That is the "brand" of the current Foundation. Maybe in the future the principles' of the Foundation won't want other wallets/services posted so they just say it is defective to prevent them from being listed? Don't you think that is a distinct possibility?
The Chairman of the Foundation was aalso ccused of all sorts of things in the recent bankruptcy trial ranging from transferring $millions in Bitcoin hours before filing bankruptcy to his legal team disrupting the court proceedings by making noises in the court while the other party was presenting their case. Now you want users to go to a web site supported by them so they don't get ripped off? Some of the same people who run this site are involved with control of that site as well. You can trust who you want but I don't trust any of those people.
The fact is they are not "official" and they don't represent anyone except themselves.