Yes, your Section 179 deduction can be greater than your line 1 income, but the Section 179 deduction in the current year is limited to the business income. The Section 179 deduction not used in this year is carried forward to next year. So, if you expect to have business income next year and don't have need a business loss in the current year (and won't be helped by generating net operating losses), taking the full amount as Section 179 and carrying the rest forward to future years may make sense.
Whether you want to reduce the Section 179 deduction in the current year depends on your circumstances. If you reduce the amount of Section 179 in the current year, the amount of the asset not taken as a Section 179 expense will be depreciated starting this year.
But, importantly, to the extent you do not choose Section 179 expense for an asset, if the asset is eligible you can use the "special depreciation" to depreciate 100% of the remaining balance in the first year. And, unlike the Section 179 expense, that special depreciation can be taken even if it "pushes" the business into a loss. If you can't "use" all that business loss and have a "net operating loss" (NOL) on your tax return, it can be carried forward to future years (and now under the CARES Act "back to prior years before forward").
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