“Are all lawns rubbish?”
And, my answer is:
Of course not
Lawns are good in their place. If you have plenty of water and no run-off issue, can devote time to keeping them healthy (please, no chemicals) – maintain them.
They are good for picnicking on, sunbathing, playing, sitting, kicking around a ball, reading, al fresco meals… the list goes on.
But, if it’s just a dead space in front of your house, where you cannot imagine sitting down with a plate of kebabs and chilled beer, barefoot and in your burry Sunday sweats, then by all means – take the turf out. And replace with plants that either attract local butterflies, bees and birds or plants that you can eat – in-season vegetables and fruit trees (or perhaps, a mix of both the habitat plants and veggies). Some plants do the function of both – create habitat and are edible to boot.
Use the space. Dead space is a waste. It could’ve been of use to someone else.