should i mention this in motivation letter for an MA?

[rachmanic]

i'm writing a motivation letter where i am asked to state why i chose this particular programme. i talked about my graduation thesis where i carried out a research and mentioned how i think it could be improved. my exact phrasing is as below:

I realized this anew when I dipped my toes in the waters of sociolinguistic research, working on the construction of distinction for the rising middle class in China. Despite the references made, analysis undertaken and conclusions arrived at, I have been suspicious of the validity of my very own research till this day: Was the discourse analysis, especially the accounts I provided for the observations too arbitrary? Would a quantitative method have contributed to the applicability of the findings? I am well aware that an absolute truth will never be revealed, but this programme, I believe, will equip me with the necessary knowledge and methodologies to understand the mechanism of language as much as possible.

what do you think of this approach? it truly is what i think about my research but i'm a bit worried if i'm being overmodest...