It is only bad if a conservative judge leaves.
In the immediate future. true
In the long run a relatively young liberal appointee could outlive a few conservative judges and, depending on who has the nomination power, will eventually change the balance in the court.
Elections do have consequences. There will be a big push to fill the vacancy before the midterm winners are seated.
This next nomination will likely be an openly gay or even tranny person. You don't need much imagination to guess how they would vote on issues. They would make the wise latina look like a screaming conservative.
If the republicans have enough cajones they could block a replacement through the mid terms. The batch we have now shows an uncanny ability to snatch defeat from the jaws of victory at every turn.