AITAH If I Tell My Sisters Boyfriend He’s Wasting My Sisters Time?!

My sister is 25 and her bum ass bf is also 25, they have been together for almost 4 years now, and since they have been together he hasn’t had a steady job, and has currently been unemployed for the last 5-6 months, claiming to be applying places, but getting no traction. When my husband and I first heard that he wasn’t getting any traction, I asked her what his resume looked like, surprisingly, he didn’t have one. He’s also a decent mechanic because that’s what he went to school for… wild right? how can he not find a job somewhere…this is also after my parents have tried to help him find jobs as well the first few months. So between my husband and I, he helped him build a pretty solid resume for him to at least find something part time so that maybe he could start his own business and work for himself and we got him set up as a sole proprietor also and that lasted about 3 weeks… he doesn’t apply himself to anything unless it falls in his lap. My sister is a GM at an auto parts store, and is working on becoming a regional manager, but is also their only source of income. She does well for HERSELF, if she didn’t have to support this bum. I’m starting to think that this clown thinks he doesn’t have to try because my sister literally does everything for him and he’s now just comfortable being a bum. Since they’ve been together they have lived at my parents house, that he doesn’t contribute to, doesn’t cook, clean, help with the dogs, maintain the yard, doesn’t really do much of anything but hangout in my sisters room, game, scroll, sleep and eat. My sister has 2 cars, one is paid off and another that she pays for, plus the insurance, gas, food, and helps my parents with bills when they ask. He drives around her in BMW supposedly “applying places” but in reality on my mom’s off days she never sees him, much less leave the house. He also claims he’s applying places still, “everywhere” but I just don’t believe him. And now as the older sister I’m about a hairpin away from telling this clown he needs to leave my sister alone cause he’s wasting her time…this is a small summary to all the chaos that has happened. His family, that none of us but my sister has met, is obviously uninterested in what he does and hasn’t tried to help him with anything. So I’m worried that my sister feels obligated to this bum because “he doesn’t have anyone else.” But also isn’t her job to fix his life either.