Because you owe it to the reader, to present to him a passage, which doesn't make him tired with the same repetitions over and over.

Who would like to read something like: {yadda yadda 'ej yadda. yadda 'ej. yadda yadda 'ej. yadda 'ej yadda yadda. 'ej yadda}. ?

You're looking for synonyms. je is not a synonym for 'ej. Don't abuse the grammar in the search of novelty of expression. No me talk funny need for to be interesting.

Su'IH 'ej Suwoch
Su'IH; Suwoch
'IHwI' tlhIH 'ej wochwI' tlhIH
'IHwI' wochwI' je tlhIH

Give them to me in context and I'll give you even more possibilities. Give me a passage you consider plodding and we'll come up with something better.

-- 
SuStel
http://trimboli.name