I don't know of many people who say a 7 year old is more challenging than a toddler that requires constant supervision.I'm kind of on the fence about having my parents visit for the "holidays". It would be for 5-6 weeks up through the new year, with them in the guest bedroom after an isolated 10 hour long drive. We're very much in need of help with our 18 month old toddler, who is becoming very active and needs non-stop supervision. We've kept him out of daycare, but we let him interact with other children at the playground (which would stop with my parents here - they'd become his playmates). Otherwise we do nothing else of risk, so I'm not really sure what the risk level is for us. But all I know is if we don't get some kind of help soon, either I'm leaving work for a few months and may be one-and-done as far as having anymore children goes. It hasn't been a bad experience, but it I'm just both so physically and mentally depleted at this point.
I can't really fault the parents of kids for breaking by this point. People without kids truly have absolutely no idea how much work it is. And I feel like we still have it somewhat easy compared to say, ensuring your 6 or 7 year old is remote learning.
Why on the fence about your parents helping out for a while? Just take a bunker mentality while they're around; go out only for the absolute essentials.