Perhaps? But I do plenty of projects where I'm just paired with another engineer. I'm maybe taking lead, but they're sitting in on all the meetings and helping make decisions when I want someone to check my work. That may be worth noting in a ticket in case I'm busy or out of office and someone needs an answer around the project, even if they don't have a specific task they're responsible for that they'd be assigned a child ticket for.
It's also a level of precision question. At some point, having a lot of child tickets is just extra work if it's mostly just documenting something that could have been as easily documented by attaching another person's name to the parent ticket.
It's also a level of precision question. At some point, having a lot of child tickets is just extra work if it's mostly just documenting something that could have been as easily documented by attaching another person's name to the parent ticket.