The best teams in MLS spend big on strikers because a great finisher can paper over a lot of cracks in the rest of the team. City doesn't win the East without Heber, LAFC doesn't win the Supporters Shield without Vela, Seattle doesn't win MLS Cup without Ruidiaz.
I also think everyone should expect some regression in White's numbers next season. He had 12 shots on target (29 attempts) this season and scored 9 of them. That rate is not sustainable.
To add to this, it would be nice to have a forward who can beat a guy (with pace or dribbling) and create from himself rather than be a one dimensional finisher relying on service from the wing. Even if someone at the Henry/Giovinco/Vela level is a pipe dream, a Ruidiaz/Blessing/Diomande shouldn't be beyond our reach.