When selecting between Magento 2 vs Bigcommerce, you should make a decision based on your business requirements, features, design, budget, expected growth.
Bigcommerce ecommerce platform provides store owners with the possibility to build a store and sell products online fast. This ecommerce solution designed for small to medium-sized businesses. If you’re a small business, without an in-house IT team and you intend to sell a few hundred products, then BigCommerce is a good choice for your ecommerce business. You can find more here
It depends upon your requirement. A non-technical person can use WooCommerce. Simultaneously, you will need to hire an e-commerce team to work on Magento.
I do agree with your statement because out there number of users usually try it by their own. And when they face errors then they start complaining regarding issue. The perfect way to install a plugin is hiring an expert.
I personally use elementor it's great and super easy i have used that in my own blog