Nope I am just sharing my thoughts and I am sharing a healthly debate here
To reconcile the use of khatas or any object which causes suffering or loss of lives of animals is more personal feelings.
as mentioned in Buddha Sutra, Buddha had advice the meat comsumption under 5 conditions: you do not see, hear, ordered the killing of the animals or the animal were killed for your etc. Meat consumption under that conditions were allowed in Buddha's time. But Buddha had encouraged vegeterian taking for those who has lack of compassion.
It is until the Buddhism spread to China, vegeterian was widely spread and those Chinese masters had misunderstood Buddha's intention by reading and "wildly" guessed His intention that eating animal's meat is equal to taking parents' meat in certain Sutra etc. Thus without lineage oral instructions authetication, they, the Chinese Buddhist masters misunderstood Buddha's intentions. We got to understand that there is a difference between you eat the animal and you kill the animal. They are not the same thing or the same process.
Since offering of Khata is offering what you think is the best for the Buddha and your Gurus and there is no direct killing involve, hence it is considered acceptable.
Although, Atisha was a vegeterian, He still has to pertake some beef during the Guru Yoga on the 10th and 25th of the month to observe the bliss and emptiness tantric commitment.