You can't control everything. We've given ourselves as good a chance as we could.
Signing Gyökeres pushed Havertz and Jesus(lol) down the pecking order so we are not (that) reliant on them. Hopefully Viktor is sturdy enough and the likes of Merino can rotate with him until Big Kai and Gabby Jesus(lol) get back.
At some point players are going to get injured, we just need to hope it's going to be spread around a little better this season and not have all our strikers or RBs injured at once.