Waste pipe access tiles

[attrayant]

I'm going to buy my second house soon and the first thing I'll do is raise the floor at least a meter. I will also be putting in a septic tank (not sure how the waste is currently being handled since the house doesn't already have one). In the first house I renovated a few years ago, the father in-law was adamant about installing access tiles at roughly 4-meter intervals in case there were ever a blockage in the main waste discharge line going out to the street. I followed his advice but think these tiles are ugly as sin and they wobble when you walk on them. I occasionally see cockroaches scurrying down into the openings between the access tiles and the floor. I really don't want to put them in the new place.

Do you think these are really necessary? In the event of a blockage, don't plumbers here know how to properly snake-out a waste pipe without lifting up floor tiles?

Here's a picture of the ones in my current place (the in-laws' house), which has fourteen of these ugly access points scattered around the property. As if that speckled tile wasn't ugly enough.

[lopburi3]

Snake is normally in the form of bamboo so there needs to be openings to insert and push/pull for cleaning. This is normally outside of house in the French drains at property line so not a big deal and often combined as drains for rainwater with open grated tops rather than completely covered. The pits at the junctions are then cleaned out to keep everything running - just as is done on all roads that I have seen here.