In the west, increase in secularity has only affected the groups of people who would've been nominally religious (i.e. religious in name only). People who attend religious services on a weekly basis (a much better measure of religiosity) has stayed consistent. This is still a notable shift in religious demographic, just not the kind your portraying.
Further, outside the west, much of the world has kept or has increased their religiosity as they modernized. The belief that modernism produces secularism was abandoned by sociologists of religion some time ago after it was evidentially false (E.g. India is the most religious country in the world and still a modern state).
The fact you can't see value in religious systems adhered to by billions of people over thousands of years speaks less to those systems than your lack of understanding them.