Sure it would be nice to have own gym at home, but there are benefits on having to go out to the gym as well. If it's too easy to get started with exercising it's also easier to postpone it just a little later.
Preparing to go to the gym is a ritual, start of a snowball where you start from small victories completing steps to get ready to leave. Get up from the couch, change into training outfit, pick your training gear and so on until you are at the gym.
When you get to the gym you have both already made a substantial effort towards exercising and accumulated some success energy completing all those subtask. You might as well do some actual workout after all that trouble so it wouldn't have been for nothing.
Of course getting there is already an achievement. You did a thing! You got out of the house. You could as well just pick up something from the gym's wending machine, read a magazine and head back home. There are no rules. You are only accountable for yourself.