They are indeed massive clubs.
But they only became massive clubs by sharing in a hundred year duopoly of success in Scottish football. Had they had to compete, throughout their history, with the might of English football's biggest clubs, they wouldn't have enjoyed anywhere near as much success.
They have no place in English football. They belong in Scotland. Just because, having bled Scottish football dry, they now covet greater riches elsewhere, it doesn't mean that we should oblige them. Especially since elevation to the higher echelons of the Premier League would inevitably come at the expense of English clubs - possibly including ours.
Besides which, they are vile clubs that attract and take hate with them wherever they go.
They can rot in Scotland.