It's fine to make a push system, but you're most likely to still need pull mechanics anyway. If my component get a push from you, but I can see that I must have

It's fine to make a push system, but you're most likely to still need pull mechanics anyway. If my component get a push from you, but I can see that I must have missed some events, I need to request them. You still need a heartbeat mechanics, so you know you would get all events. Of course, if the events become irrelevant after the fact you don't need this, but only very few systems are like that.