Tefillin, an irrelevant symbol?

Hello Rabbi,
Regarding tefillin as a counter-symbol to the Egyptian symbol, does the Rabbi know?
And if the tefillin came as a symbol (letter) and totfat, which is an Egyptian word (jewel), to counter-symbols in their time and the symbolic opposition was necessary, like the matzah, which is in contrast to the Egyptians who were a bread powerhouse.
If the symbols are no longer relevant, like the last three blessings in the dawn greetings that came as a response to the blessings of the Greeks.
If this is irrelevant, what other reason is there to assume?
There is what wise people have said, but if the response is irrelevant, perhaps you should change the response with the same principle to a relevant response.
(My assumption is that what came as a response to a certain time and a war of values ​​in rituals and symbols, and their time has passed, there is no longer any reason to hold on to those symbols and customs.) And instead of a religion that is alive and pulsating, we only burden ourselves with a lot of rituals and symbols for every war that is no longer relevant, and we are slowly killing our religion with the suffocation of hundreds of thousands of restrictive laws and customs.
If there are two types of answers please,
One of the private answers to the question.
And if possible, please direct me to more articles you’ve written on the subject and perhaps courses you’ve given so that I can purchase them and better understand how to approach such points.
Thank you very much!