Which is safer for varicose veins treatment? Is it laser or surgery?

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I have varicose veins which I ignored before because I never thought they'll cause any health issues. The problem is I had blood clot last year and my doctor advised me that I needed to undergo surgery after a year. She also told me that it can be removed by laser but changed her mind and said laser can't possibly remove this. It's been 2 years now and I also sought second opinion. The second doctor said that laser would work but she doesn't want to perform it because the saphenous veins which might be needed if I undergo coronary bypass surgery will be affected by laser. She said I need to preserve this. I told her that per my research, other doctors use the vein from the arm as a replacement for this in case a bypass surgery is needed. She said it's still better to preserve the vein in my leg. It's the reason why until now I'm still hesitant to have these varicose veins removed. I prefer laser but they don't want to. Do I need to seek third opinion? Is laser safer than surgery?