If you arent a YEC, then what are you? Why would you think the earth is old if you, so far as I can tell, reject modern geology?
If you accept extinction events, that means you would also accept that there is an order to fossils found in the earth. It means you accept radioactive dating and the fossil succession.
Or do you accept the fossil succession, but simply reject that these animals were related to one another?
But if you accepted radioactive dating and the fossil succession, but rejected relatedness of the animals in the earth, then how would you explain something like this...
https://www.sanparks.org/images//parks/kruger/elephants/elephant-evolution.jpg
Do you think these elephants are simply unrelated? Or that the proto elephants like paleomastodon or gomphotherium are simply unrelated? Or do you think they are all elephants but just look different? Yet theyre morphologically distinct, which is all evolution has ever claimed there to be (morphologically distinct, but related animals across strata in a sequence).