Are the prayers performed with tayammum due to the impurity of the place of ablution and fear of illness required to be repeated, or is an abundance of supererogatory prayers sufficient?

We have addressed your previous question and answered it under number: 80184. As for this question of yours, it provides additional clarification to what was in the first question, and the ruling does not differ from what we previously stated, as the impurity of toilet floors is not an excuse to resort to tayammum, because one can perform ablution in another place and similar methods to avoid impurity.