Or he's saying that with the unprecedented amount of players out of contract or on loan he doesn't want to have to buy 7 players to replace the out of contract ones and 4 new players to add to the team.
There are players who we could offer new contracts to that still add something to the team, if not as first team starters, as experienced bench players/role models to new/younger players - Gueye, Doucoure, Young, Coleman.
You cannot solve all the problems in one transfer window - this is what promoted sides get wrong. They sign 11 players, spending £100m+, then there's no team dynamic and they fail to adapt to the premier League.
Improve in certain key positions, strengthen in depth in others but you can't hard reset every position all at once