Business Visa - B1

Hello GM. My B1 Visa was rejected with the ‘Skilled Worker’ reason. Could anyone tell the possible reason by the below is transcription. Usually interview completed in 1-2 mins, but they took 15 mins for taking my interview.

VO: GM
Me: GM, How are you?

VO: Good, Passport Please. What is the purpose of visit?
Me: For Technical discussion and related business meeting, also acquiring knowledge of upcoming project.

VO: Are you from Which Company:
Me: xxxxx

VO: From how long you will be there?
Me: 6 Years

VO: Are you married?
Me:Yes

VO: Do you have any child?
Me: Yes

VO: Both are travelling with you?
Me: No

VO: Who is your client?
Me: ZZZ

VO: What is your company do?
Me: YYYY X

VO: What is your Client do?
Me: YYYY

VO: For how long your trip will be?
Me: 3 Months

VO surprised and asked me, if you are going for 3 months then you have some specific plan
I showed him my plan. He take it and put me on hold till 5-7 mins.. He had checked the plan and also discussed with another VO. Then he asked me as per this plan you are going for only meeting. So I told him I have another points which are mentioned in invitation latter. He asked me to show invitation letter. He again takes 5 mins to verified invitation letter with plan. Then he said,

VO: Why you cant do support through conference call?
Me: I told him we have to visit few sites and explore product but I think he has not satisfied with my answer. He told me that means your US Client cant give proper support over there and stop me.

Last he said : Sorry, we cant give you visa this time.
When I asked him the reason so he told me as per your letters, we assume that you are going for Skilled Worker and we are not approve that visa.

Really i am clueless why my visa got rejected. The reason is not valid . could any one please help