> maybe you can offer some suggestions to the IDF on how to train their soldiers better
It seems to be an unfortunate fact that all armies lose readiness during peace times, spending their resources on nonsense. You can see how tech is developing during each war, including very recent ones – suddenly, when confronted with reality, things start changing. But while every avoidable death is a tragedy, I think Israeli army is performing about as expected if not higher on the ground in this difficult war.
Also, there is a difference between army and high-tech: army requires short-term training of a large number of recruits. This was done on large scale many times. US did not have an army to speak of when entering either WW1 and WW2. Modern high-tech (iron dome and such) are not just static hardware that can be inherited from the secular state. It requires a lot of efforts of different technology and military experts to keep it working right in the face of changes. You might be able to keep the nukes, but air defence and offence will not come without trained experts and culture.