I think what some have to realise that when a player is extended it’s not because they’re great - sometimes it’s financially in that 1, it creates additional headroom from a PSR perspective (up to five years I think), 2 the club will have assessed impact on market value with minimum time remaining on existing contract and will have done their numbers on cost/benefit at what terms they can tie the players down to in the extension.
Sometimes an extension is about protecting the club as much as anything as opposed to first team value. It’s a sport AND a business.