What is the difference with new visa applications? H1B are supposed to be temporary when a company can't find employees in the country. Renewals are not meant to be automatic.
Also, h1-b is limited to 6 years (one renewal) unless I-140 (green card) has been filed for the employee. In which case, renewals become unlimited until green card is granted.
For Indians the GC queue is nearly infinite, hence too many renewals.
The H1B worker is meant to temporarily fill a gap. If there is available US talent, the H1B worker should leave and be replaced by a citizen/permanent resident.