What is a proper answer? There aren’t any hard and fast answers. People give their perspective and their reasoning. Write it off, accept it, or do what you wish, but that is about as proper as you will get.
Now doubt that with many things I agree and accept. For me it’s not enough to say that many guys are strong but slow on the track for example or that you need more recovery after heavy lifting. Yes many guys are strong and slow, but does it answer to a question that heavy lifting for T&F athlete is worthless? If an athlete through many years of training tried many combinations of plyos, Olympic lifts, sprinting, submaximal lifting then what is wrong to get another stimulus during offseason like heavy lifting when macrocycle is long enough and other qualities during that training phase are kept to a minimum? Yes, it won’t do wonders, but it won’t affect in negative way as well using adequate volumes.
I think you should read up on the thoughts many of the members here have along with that of some respected coaches. The fact you sprint once every couple of weeks for a substantial portion of the year is probably going to be hindering your training more than any lifting.
Yes, I can learn from many coaches and not just respected. How sprinting at near 100% intensity during early GPP once every two weeks can hinder my training? During that period I do more sprinting but at lower intensities. More sprinting too early in the season won’t make me stronger, won’t make me faster for summer season. It’s enough sprinting for me during GPP to maintain my motor memory for that activity. Later I’ll do it more frequently. I don’t think that I’ll forget how to sprint.