The Cubs have a higher projected RoS winning percentage than any other team in the central right now via fangraphs. Their only outgoing FA of note is Bellinger. They will, assuming Bellinger does leave, have ~$70M standing between them and the luxury tax. They have 4-5 top 100 prospects with an ETA between now and this time next year.
The hole is probably too big in 2024, but writing off 2025 as a lost season does not hold up to any scrutiny, and it's only true if the team succumbs to the mystery box thinking being suggested and trades players for unnamed prospects just for the sake of having more prospects.